Anger is another name for Fear

"The Choleric is the most emotionally underdeveloped of all the temperaments. The Choleric has such a need to be in control in every area, losing control is probably the one greatest subconscious Fears in their life.
As a born leader, their primary need is to have people around them who they can command and control and who is submissive and supportive of them. Their needs are practical and straightforward, "do it my way---Now."
Choleric think of themselves as motivators of other people. However, other people often just acquis out of FEAR because Choleric can quickly become frustrated in this attempt to motivate, and they become manipulative to the point of using people. Operating in FEAR, the Choleric probably have the angriest of all temperaments, if things don't go their way if their wishes are not followed, or even questioned or they take too long to be accomplished the Choleric can fly off into a rage. They harbor anger and can be cruel and abusive, with copious amounts of hard words, and they will win every argument. They can say angry, mean, and hurtful things and crush a gentler more insecure temperament. The words hurt, and they kill the happiness, LOVE, joy, and fun for both the recipient and the provider of the rage.
They are perfectionistic and would be quick to admit their own flaws if they ever had one. When they appear to be wrong, there must be some mistake! Because theirs is the only way that is correct and is all that matters. Yet, when the Choleric is brought under the authority of Jesus Christ, greatness can be accomplished for the Kingdom of God.
Choleric is extraordinarily strong-willed and rarely do they change their mind once it is made up. When fixed on a task to accomplish a goal, they are capable of shading the truth, skirting the law or manipulating others, any action necessary to "get err done." 
Choleric seldom listen to others opinion even if the other person happens to be right. The chloric needs to have the last word to be in control over both themselves and others. Choleric believe they can do any task better than anyone else and they know what is best for others as well as what is an acceptable action for them.
Their most significant growth need is to learn to consider others emotions and value in relationships. The forever and always ever-optimistic Choleric is incapable of seeing the pitfalls of a project they are interested in before taking action, they are so eager for change, something new and exciting can cause them to refuse to except unsurmountable risks. This goes back to them not changing their mind once it's made up and never being wrong. The Choleric will forge ahead not discouraged regardless of the cost to them or others. The Choleric in FEAR is extremely self-centered, and the needs and FEARS of others rarely matter.

Because they are so independent and self-sufficient, Choleric has a tendency to not express emotions such as LOVE, tenderness, warmth, and compassion. They find emotions unnecessary and bothersome, and they often reject the LOVE and affection of others. They are close only to a very select group of people and even then accept affection from them only on the Choleric own terms. Being a helpmate is difficult for them because they can't let their mate be "right" in any disagreements, so they have a hard time seeing the value of being a team member instead of the Boss.
Because the Choleric has such an overwhelming need to be in control in every area of life, it is not surprising that their need for control goes beyond other people to being in control of themselves as well. When we look at the Choleric, we see a born leader who easily commands and controls the people and the situations around them. We do not, however, see the Choleric deep inner need for self-control. The struggle of a Choleric is the same insecurity and FEAR that rages inside all of the other temperaments, but the way they soothe themselves is with control and productivity. Learning to walk in LOVE tempers this tendency significantly.
So basically, Choleric not only need to be in control of others they also need to be in control of themselves. Controllers are not evil people, they are just people who have been out of control at some in their life, and it didn't work well for them or others, so they made an inner vow "I will never be out of control again." This may not look like insecurity on the outside, but never the less they are as insecure as the next person, and this causes them to be in a constant state of FEAR instead of Faith. "Perfect LOVE casts out FEAR" 1 John 4:18. God is in control of everything. Relax Choleric, God can handle His job! You cannot!
The Choleric great underlying need is appreciation and acceptance for taking responsibility and for doing their duty. The Choleric often feel taken advantage of by those who do not see their accomplishments, so they don't give the Choleric credit, however, if you don't provide them with the credit they will just take it from you.
Extremely self-centered. They rarely if ever listen to anyone else's advice. They are often frustrated when trying to motivate others and end up using people to accomplish their goals. In the spirit of being in control, they associate with weak people and then judgingly resent their weaknesses. To them, the end justifies the means; so they are capable of brutal behavior. Because of this capability, lying, stealing, cheating, and any illegal activity is acceptable to get the job done. The same is true of productivity. They believe their worth comes from what they do. They must be willing to do enough to be enough. This temperament would rather be dead than unproductive. We see what an impasse this causes during their retirement years, being CEO of nothing. Jesus' words debunk this myth; we are what we do, the truth is we are who He says we are. You are valuable because that is the way you are designed, to walk in LOVE and not in FEAR of what you do or don't do. Some of your most potent prayers may be the ones you pray when praying is all you can do in a situation.
As we have said, many of the world's cruelest dictators have been Choleric when they were in FEAR. But in my opinion, the author of over one-third of the New Testament was written by a Choleric when operating in LOVE.